Mixing-machine.



H. READ. MIXING MACHINE. APPLIOATIOI'HLED un. 14. 1909.

H. READ. MIXING MACHINE. APPLICATION rum) un. 14, moo.

rammed Aug. 9,1910.

\ 2 SHEETS-SBBBT 2.

HARRY` READ, 0F YORK, PENNSYLVANIA.

MIXING-MACHINE.

Specicatioxi of Letters Patent.

Patented Aug. 9, 1910.

Application led January 14, 1909. Serial No. 472,290.

To all 'whom 'it may concern:

Be it known that I, HARRY READ, a citizen of the United States, residingat York, in the county of York and State of `Pennsylvania, have inventedcertain new and useful Improvements in Mixing-Machines, of which thefollowing is a specification.

The present invention relates to a cake mixing machine, and particularlyto cake' mixing machines of relatively large size and of that type4adapted to be operated by power. A

The object of the present invention is to improve the mechanicalconstruction of such cake mixing machines, and in particular to providean efficient andedectively disposed mechanism for operating the beater,a `mechanism for chan lng the speed of rotation of the beater in mixingbatches of material of varying consistency, a mechanism wherebythemachine is stopped when it is desired to change the speed, and inmeans for moving the bowl into and out of engagement with the beater.

The various features of novelty which characterize my invention arepointed out with articularity in the claims annexed to and orming a partof this specification. For a better understanding of my invention,however,`reference`may be had to the accompanying drawings anddescriptive matter in which I have illustrated and described one of theforms in which my invention may be embodied.

Referring to the accompanying drawings: Figure l shows a front elevationof the cake mixer. Fig. 2a side elevation with the pulleys to the rightbroken away. Fig. 3 represents a plan View of thehead or upper part ofthe machine, the lower portion being omitted. Fig. 4 illustrates anenlarged vertical section on the line of 4.-4: of Fig. 2 of v al portionof the head, showing the arrangement of the speed-gears. Fig. 5represents a detached diagrammatic view of the speedgears when adjustedto an intermediate position and working at a moderate speed, as also theconnection between the gear shifting mechanism and the belt shifter.Fig. 6 shows a similar view with the gears shifted to operate themachine at its highest speed, and Fig. 7 another similar view showingthe gears adjusted to operate the machine at its owest speed. y A,denotes a vertical frame or standard having a' base A1, and an upperextension or l secured against turnin head A2. The head A2, is providedwith bearings supporting a main shaft B, the same having theconventional fast and loose pulleysB1 and B2. Below the shaft B is anauxiliary shaft C, suitably journaled in the head A2 and driven from theshaft B by means of interposin ears whichmay be readlly interchangedyIer the purpose of Varying the speed of the mixer in a mannerhereinafter described.` The lforward end of the head A2, is providedwith a boss at proi vided with socket to receive a xed shaft D, byvmeans of a set screw a. The shaft C as secured to its forward end abevel-pinion C1 which meshes with a corresponding bevel-wheel C2,loosely mounted upon the lixed shaft D. The hevelwheel `C2 is providedwith a depending bracket C3, having a central bearing c3, inclosing thefixed shaft D, and an eccentric bearing c* of considerable lengthadapted to hold a beater-shaft E1. Between the bevel wheel C2 and thebearing c3 of the bracket is an internal gear F," which is stationary byreason of the fact that it is secured to the fixed shaft D.

The upper end of the mixer shaft El, is provided with a pinion E2,meshing with the internal gear F, and the lower end of the mixer shaftis furnished with a detachable beater E. By this arrangement the beaterwhich is arranged within a bowl will be caused to traverse a circularpath on the inside circumference of the bowl, the axis of which .is thefixed shaft D,while the beater is iven an independent rotary movementwit in the bowl in an opposite direction and upon its shaft E1.

The frame A of the machine is provided with vertical guides, a, a,which, carry an annular ring or bowl support Gr1 in which is suspendedthe bowl G. The bowl support togetherwith the bowl is raised and loweredto brin the bowl into and out of engagement with the beater E, by meansof a vertical screw H, adapted to an internally threaded boss g, on thebowl-support and guided in the upper and lower portions of the frame A.The upper end of the screw H, is provided with a hand wheel H1, by whichmeans the screw may beturned.

Referring to the driving mechanism and particularly to the meansemployed forchanging the speed of the beater, the gears interposedbetween the upper or `main shaft B, and the lower or auxiliary shaft Care arranged in the following manner. Upon the shaft B,is journaled amovable gear-box I, carrying gear wheels I1, I2 and I8. The

gear wheel l'l is splined to the shaft B,

and is therefore free to move forward or backward upon said shaft whilethe gearwheels I2 and I, are connected together and mounted upon a shaftI, also carried by the gear-box I. Securely fastened to the shaft (l,are gear wheels J L and J 2 either of which is adapted to engage one orthe other of the gear-wheels I2 and I, when said gear wheels are movedunder the influence of a wormshaft K. 'lhe worm shaft K, is supported inbearings la', k2 and le, and is provided with a worm Kl which is splinedto the worm shaft so as to turn with it but is confined against lateralmovement by the bearings k1 and 162. The function of the Worm K1 is tooperate a belt shifter L, to move a belt from the fast pulley B1 to theloose pulley B2 and vice versa and to this end the square rod L1 of thebelt-shlfter is provlded with pins Z, Z, which engage the sald worm. Asthe worm shaft K is turned in its bearings by means of the handle K2,its `first effect as before stated is to operate the belt shifter andmove the belt from one to the other of the pulleys, which requires abouttwo-thirds of a revolution. The worm shaft K is provided with a pin 7a4,adapted to engage a lug 4 on the gear-box I, and sald worm-shaft is alsofitted with a split ring or locking-collar K4, adapted to' notches a4,a5 and a, in the head A2, as shown by dotted lines in Fig. 3. As theworm shaft is further turned after having moved the belt shifter, thepin le* will be brought into engagement with the lug i, and will lift orturn the gear-box on the shaft B. This wlll disengage either of thegears on the shaft I4, from those of the shaft C, the movement requiringabout one-sixth of a revolution'of the worm shaft. The entire movementincluding the movement of the belt-shifter being about ive-sixths of arevolution. VvWhen a complete movement of worm shaft has been thus made,the slot in the lockingcollar K4, (see Fig. 4) will be in line with oneof the notches a, a5 and a", of the upper part of the frame of themachine, and the horns if of the gear-box I, will have closed in on thereduced portion of said worin-shaft indicated at K5. In this positionthe gear-box and its gears may be shifted to either of the positionsshown in Figs. 5, 6 and 7 by a lateral movement of the worm-shaft. Theposition indicated in Fig. 5 shows the gear Wheel I2 on the shaft I, inmesh with the large gear J'1 on the shaft C, in which case the machinewould operate at a moderate speed. As indicated in Fig. 6 the gear wheelI2 on the shaft I4 is in mesh with the small gear J2 on the shaft C, inwhich position the machine is geared to operate at its highest speed.4In the remaining position indlcated in Fig. 7 the machine is geared tooperaie at its slowest speed in which ease the gear l. 'on the shaft I4is shown in mesh with the large, gear J l on the shaft C.

The construction illustrated and described possesses advantageousfeatures. Among these may be mentioned the ease with which the. partsmay be constructed and assembled and thereafter adjusted, and thecompactness and simplicity of the cake mixer as a whole. In a cake mixerof this type it is desirable not only that the speed should vary inorder to facilitate the working of batches of goods of greater or lessconsistency, but also as a. means of gradually furthering the process ofaeration of certain kinds of goods required to be exceedingly light andspongy.

Having described my invention what I claim is:- y

l. A mixing machine comprising a stands ard, a bowl support guided 1nthe standard and provided with a bowl-ring, a removable bowl adapted tobe supported by the bowlring, a vertically'disposed beater adapted toenter the bowl, means controlled by a screw for adjusting the positionof the bowl to und from the beater and means for revolving the beaterupon a vertical axis and moving the same in a circle in said bowl.

2. A mixer, comprising a bowl, a beater adapted to rotate within thebowl, a horizontally disposed main shaft, an auxiliary shaft parallelwith the main shaft, intermediate speed changing gears hung to the mainshaft, gears mounted upon the auxiliary shaft, and means whereby theintermediate gears may be lifted and afterward moved laterally to engageone or the other of the gears of the auxiliary shaft.

3. A mixer com rising a bowl, a beater adapted to rotate within thebowl, upper and lower shafts, gears mounted on the lower shaft, a gearbox provided with gears adapt-I ed to turn with the upper shaft and toslide laterally upon the same and means for shifting the gear box andits gears into and out of engagement with thegears of the lower shaft.

4. A mixer comprising a bowl, a beater, upper .and lower shafts, gearsixedly secured to the lower shaft, a gear box having gears which areadapted to turn with the upper shaft and free to slide laterally uponthe same, a belt shifter, a worm shaft having a worm adapted to rotateto operate the belt shifter' and by a further movement to raise the gearbox and its gears out of engagement with the gears of the lower shaft,said worm-shaft being free to move laterally to shift the upper gearsinto and out of engagenlilerrt with the several gears of the lower S at.

5. A mixer comprising a bowl, a vertical frame having a member forming asupport for the bowl, a fixed vertical shaft depending from the frame, abevel gear adapted to turn upon the fixed vertical shaft and having adepending eccentric bearing for a beater shaft, a driving shaft and abevel pinion thereon the `latter engaging the aforesaid bevel-gear, aninternal gear Secured to the fixed vertical shaft, a beater having ashaft adapted to the eccentric bearing and a pinion on said shaftengaging the internal gear.

G. A cake dough mixing machine, comprising a standard, a bowl, a bowlsupport movably mounted thereon, a vertical screw engaging said bowlsupport for adjusting the position thereof, a beater, a main shaft, anauxiliary shaft parallel with the main shaft, speedchanging gearsinterposed between the main shaft and the auxillary shaft and amechanism whereby the gears of one shaft may be shifted and brought intoand out of engagement with the gears of the other shaft to alter thespeed of the beater.

7 A mixer comprising a vertical frame provided with a bowl support, anda detachable bowl, a main shaft journaled in said vertical frame, anauxiliary shaft arranged parallel to the main shaft, a beater geared tobe driven by the auxiliary shaft, gears interposed between the main andthe auxiliary shaft, the gears of the main shaft being adapted to movelongitudinally while those of the auxiliary shaft are x'ed in positionand a mechanism. whereby one set of gears may be brought into and out ofellgagement with the other. n

8. A mixer comprising a bowl, a vertical frame -provided wlth an annularbowl support, a power shaft journaled in the frame, p

a vertical shaft xedly secured to the frame, a bracket geared to thepower shaft and free to turn upon the fixed shaft, said bracket beingprovided with a journal and 'a beater shaftadapted thereto, a beaterdetachably secured to the lower end of the beater shaft, a pinionsecured to the upper end of the beater shaft, and an internal gearsecured to the fixed vertical shaft and in mesh with the pinion of thebeater shaft.

9. In a cake dough mixer, a standard, a

for rotating the beater upon 'its axis and moving the same in a circularpath in said bowl, a main drive shaft, an Vauxiliary shaft arrangedparallel to the main shaft, complementary speed change ears mounted onthe main and auxiliary sha s, and means for selectively combining saidvgears in operative relation. v

In testimony whereof I affix my signature in presence of two witnesses.

HARRY READ.

Witnesses:

CHARLES A. MAY, Manera SHANABROUGH.

